Look I’m not looking to get into an argument here.So I guess the performance loss is noticeable on the Hyundai engines or was he just generalizing? It would seem that if one lets the build up accumulate too much that a cleaner isn't going to do the trick and the dealer is going to have to remove the valve cover and blast it off. I bet that costs a lot more than $119.
That's why it's BS that this issue isn't covered by the 100k powertrain or at least the 50k b2b warranty. They should put the routine cleaning on the maintenance schedule for the GDI engines if it's going to be considered a wear item.
I'm sure any universal catch can would work. For me, I spent $30 on parts from Home Depot and built my own using a compressor oil/water separator filter that is completely unnoticeable. Also, it's clear so I can when it's full of blow by and simply unscrew the bowl and dispose of the gunk.
I literally just put it in a couple weeks ago. I haven't had to dump it yet but at the current rate I would say every 2 months give or take a couple weeks.What's the capacity; how often do you have to dump it?
plans? I might even put one on my Oldzuzu...LoL.
That will not provide any benefit for this particular issue as fuel does not flow over the intake valves in a gdi engine.I think that it's in the owners manual that you are to add a fuel treatment to a tank of fuel every 7500 miles if you don't use high detergent fuel in your vehicle.
since the gas never touches the top of the valve on a direct injection engine, how exactly does using a top tier gas do anything to keep the valves clean?I work as a BMW advisor and of course we recommend top tier fuel (www.toptiergas.com). I still see carbon build on (especially on direct port injection vehicles) and I guess its all these fuel companies using crappier contents in their fuels. I heard an additive is recommended very often, as well as top of top tier gas stations (per some technicians I work with).
Some BMW 335's have this issue and SES lights come on; the tech goes in and cleans it up for a nice fee and customers are happy again with the performance restored.
exhaust valves i could see, but intake valves make no sense.
You better make sure you put it back exactly like it was from factory. Otherwise you may have voided your engine warranty. I would never take apart car engine while it is in warranty even though I have rebuilt several engines. Let the dealer do their job of providing the free service checks and repairs if needed under warranty.
This article has been referred to many times here. And no doubt, DI engines have been presenting problems to owners of some - not all - car companies. At the same time, DI is here to stay and will be in all the newer, smaller engines for years to come. Manufacturers will have to get it right. I don't think DI alone is a reason not to buy a particular car, even at this stage of the cycle.Hmm... having thoughts about trading in my non GDI 2011 4.6 for a new Rspec because of this problem.
Found some interesting reading concerning GDI engines and carbon issues.